Seagate ST3146854SS SAS Hard Disk Drives

Capacity: 146GB
Spindle Speed: 15,000RPM
Interface Type: SAS / Serial Attached SCSI
Disk Size: 3.5″x1.0″ (LFF Hard Drive)
Sustained Throughput (MBps): 85.6 to 142.7
Average Seek Time (read/write ms): 3.5 / 4.0
Electrical Interface Speed: SAS / Serial Attached SCSI – 3.0Gbps
On-Board Cache: 8MB

The Cheetah 15K.4 is the best performance, lowest cost of ownership, 3.5-inch disc drive. It enables higher performance with fewer drives, while offering the industry’s highest reliability. Features Benefits 15K RPM spindle speed   Delivers more I/O’s per second than 10K, and faster sustained transfer rates, enabling the same high performance to be met with fewer drives.    Background Media Scan   Proactively scans the media for potential defects during drive idle time without using system bandwidth. It enables incipient errors to be corrected before data is lost.   Enhanced Error Correction Code   Better maintains performance throughout the life of the drive and reduces the probability of lost data.   Fluid Dynamic Bearing Motor   No ball bearings means reduced acoustics and improved reliability.    Full Duty Cycle Reliability    The Cheetah 15K.4 is designed to have the highest reliability, even when in used in demanding applications around the clock, 365 days per year.    Serial Attached SCSI (3 Gb/sec)   Serial Attached SCSI (SAS) enables high-performance 15K SAS drives to interoperate with high-capacity NL35 SATA drives helping simplify and consolidate tiered storage.    Distinctions 30% more IOPS and more than 20% faster response times than 3.5-inch 10K drives The industry’s highest reliability, with 1,400,000 hour MTBF

Description
Model number		ST3146854SS
Model Name		Cheetah 15K.4
Form Factor(width)		3.5-inch
Form Factor(height)		1-inch
Physical Specifications
Height		25.4 mm
Width		101.6 mm
Length		146.05 mm
Weight		0.68 kg
Capacity/Interface
Formatted Capacity		146 Gbytes
Performance
Transfer Rates
Internal Transfer Rate (min)		685 Mbits/sec
Internal Transfer Rate (max)		1,142 Mbits/sec
Formatted Int Transfer Rate (min)		85.6 MBytes/sec
Formatted Int Transfer Rate (max)		142.7 MBytes/sec
External (I/O) Transfer Rate (max)		300 MBytes/sec
Seek Times
Average Seek Time, Read		3.5 msec typical
Average Seek Time, Write		4 msec typical
Track-to-Track Seek, Read		0.2 msec typical
Track-to-Track Seek, Write		0.4 msec typical
Full Disc Seek, Read		7.4 msec typical
Full Disc Seek, Write		7.9 msec typical
Average Latency		2 msec
Other
Default Buffer (cache) Size		8,192 Kbytes
Spindle Speed		15K RPM
Spinup Time		20 sec
Power-on to Ready Time		3 sec
Configuration
Number of Discs (physical)		4
Number of Heads (physical)		8
Total Cylinders		50,864
Total Tracks		406,912
Bytes Per Sector		512
Track Density (TPI)		85,000 tracks/inch
Recording Density (BPI, max)		628,000 bits/inch
Bytes/Track (avg)		471,916
Recording Components
Electrical Requirements
Current
Typical Current (12VDC +/- 5%)		1.17 amps
Startup Current (12VDC +/- 5%)		2.86 amps
Typical Current (5VDC +/- 5%)		1.12 amps
Startup Current (5VDC +/- 5%)		1.7 amps
Power
Idle Power (typ)		14.34 watts
Environmental Specifications
Shock and Vibration
Max Operating Shock (2-msec)		65 Gs
Max Nonoperating Shock (2-msec)		250 Gs
Operating Vibration (max)		0.5 Gs
Nonoperating Vibration (max)		2 Gs
Temperature and Humidity
Operating Temperature (max)		55 deg C
Operating Temperature (min)		5 deg C
Nonoperating Temperature (max)		70 deg C
Nonoperating Temperature (min)		-40 deg C
Operating Temperature Change (max)		20 deg C/hr
Nonoperating Temperature Change (max)		20 deg C/hr
Operating Humidity (max)		95 percent
Nonoperating Humidity (max)		95 percent
Operating Humidity Change (max)		20 percent per hour
Operating Wet Bulb Temp (max)		28 deg C
Altitude
Operating Altitude (max)		3,048 m
Operating Altitude (min)		-305 m
Nonoperating Altitude (max)		12,210 m
Nonoperating Altitude (min)		-305 m
Acoustics
Acoustics, Idle (sound power, typ)		3.6 Bels
Reliability
MTBF (Hours)		1,400,000 hours
Recoverable Read Errors		10 per 1012 bits read
Nonrecoverable Read Errors		1 per 1015 bits read
Seek Errors		10 per 108 bits read
Supports S.M.A.R.T.		Yes
Service Life		5 year(s)